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How old is space?
13.8 billion years
This information helps astronomers determine the age of the universe. Age may only be a number, but when it comes to the age of the universe, it's a pretty important one. According to research, the universe is approximately 13.8 billion years old.
Why is space completely silent?
Space Environment
So, in order for sound to travel, there has to be something with molecules for it to travel through. On Earth, sound travels to your ears by vibrating air molecules. In deep space, the large empty areas between stars and planets, there are no molecules to vibrate. There is no sound there.
Interesting Facts About the Solar System
Solar System Facts
The definition of a planet and a moon is fuzzy. ...
Comets and asteroids are leftovers. ...
The planets are all on the same “plane” and orbit in the same direction. ...
We're nowhere near the center of the galaxy. ...
But the Solar System is bigger than you think. ...
The Sun is hugely massive. ...
We haven't finished searching for life here.
Space Facts
The solar system includes the Sun and all the objects that orbit around it due to its gravity. ...
The Solar System formed around 4.6 billion years ago.
There are eight planets in the Solar System. ...
The inner planets (also known as terrestrial planets) are smaller and made mostly of rock and metal.
Space is completely silent. ...
The hottest planet in our solar system is 450° C. ...
There may be life on Mars. ...
Nobody knows how many stars are in space. ...
Halley Comet won't orbit past Earth again until 2061. ...
A full NASA space suit costs $12,000,000. ...
Neutron stars can spin 600 times per second.
What are 3 facts about the solar system?
How cold is space?
As you probably know, space is already very, very cold — roughly 2.7 Kelvin (-270.45 Celsius, -454.81 Fahrenheit). This is mostly due to a lack of atmosphere and the vacuum-like nature of space — with very few molecules to energetically bounce around, there can be no heat.
Why Pluto is not a planet?
The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one- it “has not cleared its neighboring region of other objects.”